This non-historical frame was produced 1989 in London, shortly after the painting had been restored. That circumstance was a chance to think about the framing. The then director, Dr. Rüdiger Klessmann, decided to renew the old frame and, more importantly, to change the color in order to increase the sense of spatial depth of the picture. The previous frame not the original one. It was somewhat similar to the frame of The Milkmaid, but of inferior quality. No specific date an be given to the wooden frame, although it may be from the end of the nineteenth century.
Image courtesy Mike Buffington.